Generic Mission Pr Generic Mission Process ocess Modelling - - PowerPoint PPT Presentation

Generic Mission Pr Generic Mission Process

• cess

Modelling Modelling

for

Near Ear Near Earth As h Asteroid Pr id Prospecting

• specting

by

Tim Broadbent UNSW Sydney – Satellite Systems Engineering 3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney

The Introduction

• MEngSc Thesis
• Satellite Systems Engineering at UNSW
• Satellite Controller (Optus Satellite) … I fly spacecraft - 24h - 365d
• My perspective is Satellite Operations
• Statistics and processes

Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Problem

• Progress is slow
• Gaps need to be bridged
• Greater emphasis on

prospecting

Industry Academia Business

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Scope

• Near Earth Asteroids
• 100m – 1km
• Low ∆v
• Frequent opportunities
• No specific spacecraft size
• No specific mission type (e.g. flyby or sample return)

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Objective

• Generalise the prospecting mission process
• Target selection
• Mission design
• Launch & transfer
• In-situ analysis
• Identify opportunities for increased automation

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Stats

• ≈ 8,000 NEAs (100m-1km)
• ≈ 500 more are discovered

each year (>140m)

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Stats

• Anything brighter than H = 21

is always > 100m

• Only ≈ 12% have documented

diameters or rotation rates

• 4% have both
• 50% at H < 16 (i.e. > 1km)

16 18 20 22 24 0.0 0.2 0.4 0.6 0.8 1.0 Abolute Magnitude (H) Diameter (km)

• Abs. Magnitude vs Diameter

21

12 14 16 18 20 22 0.0 1.0 2.0 3.0 4.0 5.0 Abolute Magnitude (H) Diameter (km)

• Abs. Magnitude vs Diameter

“Good” data

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Stats

1) 74% have inclinations < 25° 2) 93% have Synodic Period < 5 years 3) 49% are in Apollo orbits

%’s of NEAs with H < 21 from JPLs Small Body Database query tool (13/9/17)

• 69% meet the first 2 criteria
• 33% meet all 3 criteria

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Mission

• Flyby ($)
• 1D mass, shape imagery, rotation
• Orbiter ($$)
• 3D mass, surface spectrography
• Lander / Sample Return ($$$)
• Geology / minerology / chemistry

NEAR (1996-2001) $250m Deep Space 1 (1998-2001) $150m Hayabusa (2003-2010) $300m Chang’e 2 (2010-2012) $100m Dawn (2007- …) $500m Rosetta (2004-2016) $2b Hayabusa 2 (2014- …) $150m OSIRIS Rex (2016- …) $1b

O F S R F O O/L S R S R

3rd Off Earth Mining Forum Generic Mission Process Modelling for Near Earth Asteroid Prospecting

Generic Mission Process Modelling for Near Earth Asteroid Prospecting 3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney

The Process

The Process

Generic Mission Process Modelling for Near Earth Asteroid Prospecting 3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney

The Modelling

• Pre-mission
• Light curve
• Radar Doppler
• Mid/post-mission

1620 - Geographos 25143 - Itokawa

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The Solution(s)

• Integrated process models (e.g. BPMN 2.0)
• Automated cataloguing
• Model generation and refinement
• Swarm-focussed TT&C software

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney Generic Mission Process Modelling for Near Earth Asteroid Prospecting

Generic Mission Process Modelling for Near Earth Asteroid Prospecting

The End

Thank you for coming Any Questions?

3rd Off Earth Mining Forum 20 - 21 September 2017, UNSW Sydney